The McLaren M840T is a 4.0 liter, Twin Turbo, flat plane V8 engine that powers the 720s, Senna, GT, Speedtail exotic sports cars. Released in 2017, this is the latest upgrade to the 3.8 liter M380T found in older models like the 650s. Even further back, the engine carries residual DNA of a LeMans Nissan Engine and turbos from a Mitsubishi EVO.
After it’s launch, the 720s quickly became popular amongst tuners, sharing drag strips with the likes of Nissan GT-R’s and Audi R8s, yet claiming a lane for itself with an identifiable exhaust note. Our friends at EKanoo Racing were amongst the first to start testing the limits and set the benchmark by running 8.85 seconds at 159 mph, with the addition of performance downpipes, air filters a tune and MS109 fuel.
As others enthusiasts began to modify and upgrade their McLarens, Magnus began getting calls for repairs and upgrades. McLaren did not offer replacement parts at the time and customers requested increased loads of over 1500 hp to be placed on the engine. Post mortems revealed the engines were suffering from excessive oil consumption, early failure and bent connecting rods – and a need for replacement McLaren Parts.
The Magnus McLaren Engine Development Program utilizes our over 27 years of experience in producing some of the worlds finest racing engines and road engines. We have produced proprietary Pistons, Connecting Rods and Crankshaft, as well as improved Cylinder Liners, Head Gaskets, Fasteners, and all other associated parts needed to build and manage added power.
Magnus has developed a Longblock engine program for Mclarens, we only provide sealed units for the client. No Shortblocks, we receive your engine and completely recondition it to the modifications of your choice Stage 1 or 2. We can also offer to upgrade your M838T 3.8L engine to M840T 4.0L spec. A good core must be provided. You will receive complete and sealed engine with all timing components installed, and valve covers and engine covers attached.
Contact us by email if you need help with shipping your core. Shipping engines for over 27 years worldwide we have logistics sorted
Magnus Motorsports McLaren Engine Program Includes:
M838T : MPC4-12C / MP4-12C GT3 / 650S / 675LT /MSO 688 HS
M838TQ : P1 / P1 GTR / P1 LM
M838TE : 540C / 570S / 600LT / 620R
M840T : 720S / 720S GT3 / 720S GT3X / 765LT / Speedtail
M840TR : Senna / Senna GTR / Elva
M840TE : GT
Magnus can Restore these noted engines to Factory specification or offer a more robust solutions in 3 packages: Stage1 / Stage 2 / Stage 3.
Stage 1 MMEENG7250
Recommended for 800 hp to 1400 HP capable, complete engine refresh including magnus proprietary pistons and rods
Recommended for 800 hp to 2000 HP capable, complete engine refresh including magnus proprietary pistons and rods (crankshaft guided rods) , billet crankshaft, fasteners, engine gaskets
Exciting news to come for Stage 3 builds
MMEENG7250 – Stage 1 Magnus Mclaren engine rebuild Stage 1 Longblock only (must provide core) 1400 hp
MMEENG7251 – Stage 2 Magnus Mclaren engine rebuild stage 2 Longblock only (must provide core) 2500 hp
MMCENG1200 Magnus Mclaren M840T 720s and 765 Connecting Rods
MMCENG1210 Magnus Mclaren M840T 720s and 765 Pistons
MMCENG7200 Magnus Mclaren M840T P14 720s 765 Engine Block
MMCENG7201 Magnus Mclaren M840T P14 Billet Crankshaft
MMCENG7203 Magnus Mclaren Thrust Bearings
MMCENG7204 Magnus Mclaren Bolts and Washers
MMCENG7205 Magnus Mclaren Friction Washer
MMCENG7206 Magnus Mclaren M840T 4L Piston Sleeves
SYVECS S7Plus Plug and Play ECUs for : M838T and 720